Mac with 10.9.  Sibelius 7.1.3, Kontakt player 5, VDL, and VDL Template 7.0a.2.  Installed a couple days ago.  All appears to be working until playback.  The mixer shows the interments playing, but no sound is heard.  If open Kontakt by itself and play an instrument, there is sound.  Also when you launch Sibelius, the intro music can be heard.  Have been researching for a couple days.  Any suggestions?